Wire stripping pliers



F 1952 E. J. BEAULIEU ET AL 2,585,080

WIRE STRIPPING PLIERS Filed May 2'7, 1948 A TTORA/Z-Y Patented Feb. 12, 1952 Ezra 'J; Beaulieu and Robert E. Thompson, Downers Grove,- Ill., assignors to Western Electric..Company,.lncorporated, New York, N. Y.,

a corporation of New York Application May 27, 1948, Serial No. 29,438

This invention relates to wirestripping pliers and more particularly to combination pliers for cutting wire and severing and stripping insulation from an insulated wire.

vAn object of this invention is to provide a .simple and efiicient wire stripping and cutting pliers.

In accordance with the general features of this invention, there is provided, in one embodiment thereof as applied to a wire handling and cutting pliers of a usual known construction, a wire guide member secured to one of the pivoted jaws which are each recessed in a usual manner at one side, the wire guide memberextending transversely of the jaws and into the cooperating recesses but spaced from the walls thereof. The guide member is formed with a slot for receiving and guiding into operative position the end of an insulated wire which is to. be stripped of insulation, the bottom of the slot being. axially aligned with cooperating half-round cuttingedges .provided in each of the jaws to provide an annular cutting edge when the jaws are closed for circumferentially severing the insulation on the wire without engaging or marring the wire itself. Each jaw is provided wtih the usual cutting edge at one side which cooperate to cut the wire, such wire cutting edges being in alignment with the-half round insulation severing edges.

Other objects and advantages of this invention will more fully appear from the following de- (2 Claims. (01. 81-95) tailed description, taken in conjunction with the accompanying drawing, in which Fig. 1 is a side view of the pliers embodying the features of the invention, the jaws being shown in their open positions;

Fig. 2 is a fragmentary enlargedside view of a portion of Fig. 1 with'a wire in'position in the guide member; V

Fig. 3 is a plan view, partly in section, taken on the line 3-3 of Fig. 2;

Fig. 4 is an end view taken on the line -44 of Fig. 2; I

Fig. 5 is a fragmentary side view looking at the opposite side of the pliers from that shown in Fig. 2, the jaws being shown in their closed positions with the insulation on the wire circumferentially severed;

Fig. 6 is a vertical sectional view taken on the line 6-6 of Fig. 5; and

Fig. '7 is a view similar to Fig. 6 showing the wire after being longitudinally withdrawn from the pliers with the severed insulation stripped therefrom.

As shown in the drawing, referring particularly to Fig. l, the numeral lil represents, in general, pliers of a conventional and known construction comprising the usual handles 1 i and [2, which are pivoted at l3 and provided with upper and lower opposed jaws M and 15 of the long nosed type and having opposed straight cutting .edges I 8 and i9, respectively, at one side (Figs. 2

and 4) intermediate their ends. To the left of the cutting edges [8 and I9, as viewed in Figs.

'1 and 2, the jaw ends I4 and l5"have their opposed cooperating surfaces scored at 2'0 and 2|, respectively," for gripping purposes. The sides of the jaws l4 and I5 opposite the cutting edges I 8 and I9 are formed with opposed recesses 24 and 25, respectively, of the usual type (Figs. 5 and 6), which extend transversely and longitudinally of the jaws for the length of the cutting edges. Formed in each of the jaws I l and [5 along the cutting edges l8and l9 are half-round cutting edges 26 and 21, respectively, which, when the jaws are closed, as shown in Figs. 5 and 6, form a cutting hole of a diameter slightly greater than the diameter of a wire 28 (Figs. 6 and 7) fromwhich. the surrounding insulation is to be circumferentially severed by the cooperating half-round cutting edges 26 and H. The diameter of the cutting hole provided by the cutting edges 26and 21 willb'e dependent on the size of the wire to be stripped of insulation and should be such that 'thecutting edgeswill not engage the wire and thus no marring of the wire occurs- In the closed positions of the jaws M and iii, the engagement'of the scored surfaces 29 and 2| serve to limit the movement of'the jaws beyond points which'are necessary forthe' half- -round cutting edges 26" and 2'! to circu'mferem tially sever the insulation on the wire 28 but will permitthe straight cutting edges l8 and I9 to cut the wire. In :order to Iiorm sharp half-round cutting edges 26- and 21 along the cutting edges 18 and I9, respectively, fiat faced slotsj29 and 3!] (Figs. 2 and 6) are milled in the sides of the jaws l4 and.l5 to adepth coinciding with the planes of thecutting edges |8 and |9. I I

The jaw l4 carries a guide member3l for the purposeof accurately .positioning and guiding the end of aninsulated wire 28 into accurate position between the half-round cutting edges 26 and 21 of the open jaws i l and 15, whereby, when the wire is inserted from the forward sides of the jaws, as shown in Figs. 1 and 2, it may be stripped of insulation at its end. The guide member 3| comprises, in the present embodiment, an L-shaped member (Fig. 3) having its longer arm 32 secured by screws or rivets 33 to the outer face of the jaw l4 and its shorter arm 34 extending transversely into the space formed 

